Hey -
If you have a widget blueprint asset in your project, then the easiest solution would be to select each button and scroll to the Navigation section of the details tab. Here you can specify the behavior when you use the arrow keys or other input to switch focus from one widget component to another based on direction. If you would like to do this in code, I would recommend looking at the documentation for FNavigationReply which handles this behavior on the code side (FNavigationReply | Unreal Engine Documentation ).
Cheers